Magnesium alloy surface corrosion-resistant super-hydrophobic film layer and preparation method and application thereof
A magnesium alloy and super-hydrophobic technology, applied in the coating process of metal materials, coatings, etc., can solve problems such as complex processes and no anti-corrosion mechanism
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[0028] One aspect of the embodiment of the present invention provides a method of preparing a magnesium alloy surface to resist the superhydrophilic membrane layer, including:
[0029] Provide magnesium alloys as a substrate;
[0030] A layer-shaped bimetallic hydroxide film having a micronide structure is formed on the surface of the substrate, wherein the metal elements in the layered bimetal hydroxide film include Al and Mg;
[0031] And, hydrophobize the obtained layer bimetallic hydroxide film, thereby producing the surface of the magnesium alloy surface to resist the superhydrophobic film layer.
[0032] In some more specific embodiments, the preparation method comprises:
[0033] The magnesium salt, aluminum salt is dispersed in water to form a solution, and then the pH of the solution is 10 to 12, and then the carbonate is added, and the reaction is reacted at 70 to 90 ° C for 1 to 2 h, and magnesium aluminum suspension is obtained. ;
[0034] As a result, the substrate is...
Example Embodiment
[0074] Example 1
[0075] (1) Since 400 #, 800 #, 1200 #, 1500 # SiC sandpaper is polished on the surface of the magnesium alloy sample, after absorbent is washed 10 min in anhydrous ethanol, then naturally dried in the air, all samples are in 0.1 mol The NaOH solution of / L is etched 60S to remove the surface of the oxide layer and then dried under atmospheric conditions;
[0076] (2) Synthesis of MGAL-LDH membrane:
[0077] 4.608G mg (NO 3 ) 2 · 6h 2 O, 2.25G Al (NO 3 ) 3 · 9h 2 O Dispersed in deionized water and stirred under hydrothermal conditions, then add 0.2 mol / L NaOH solution until the pH of the solution was 12, then add 0.318 g of NA. 2 CO 3 The whole system was added to 300 mL, and 1 h was placed in an oil bath at 80 ° C, and then the magnesium alloy sample treated with step (1) was placed in a high pressure reaction kettle (130 ° C reaction for 18 h. ); Finally, the prepared sample was taken out and washed with deionized water, and then dried at 65 ° C for 10 h;
...
Example Embodiment
[0081] Example 2
[0082] (1) Since 400 #, 800 #, 1200 #, 1500 # SiC sandpaper is polished on the surface of the magnesium alloy sample, after absorbent is washed 10 min in anhydrous ethanol, then naturally dried in the air, all samples are in 0.1 mol The NaOH solution of / L is etched 60S to remove the surface of the oxide layer and then dried under atmospheric conditions;
[0083] (2) Synthesis of MGAL-LDH membrane:
[0084] 4.608G mg (NO 3 ) 2 · 6h 2 O, 2.25G Al (NO 3 ) 3 · 9h 2 O Dispersed in deionized water and stirred under hydrothermal conditions, then add 0.2 mol / L NaOH solution until the pH of the solution was 12, then add 0.318 g of NA. 2 CO 3 The whole system was added to 300 mL, and 1 h was placed in an oil bath at 80 ° C, and then the magnesium alloy sample treated with step (1) was placed in a high pressure reaction kettle (130 ° C reaction for 18 h. ); Finally, the prepared sample was taken out and washed with deionized water, and then dried at 65 ° C for 10 h;
...
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